[dwm] executing programs won't work with tcsh

hi,

I am using tcsh and got some problems, when i want to start a program
with M+p. The problem is, that tcsh assigns variables with "set <name>
<value>" and not like the sh shells with "<name>=<value>". I patched
the config.def.h (patch is attached) to directly exec the output of
dmenu and mailed it to Anselm, but he pointed out, that there will be
problems if the user presses Esc, which causes exec to execute "".

Does anyone of you know a solutions for this problem?

bye
richi